With my volunteer account, I was doing some Add Link edits on de.wiki last week. @MMiller_WMF pointed out that I had an edit reverted, which I didn't know about because revert notifications default to web (no emails) and for whatever reason, I didn't tap on the notifications count.
I was thinking if we could improve the experience for newcomers who have an edit reverted. The existing notifications suffice for experienced users, but for a new editor, maybe an overlay screen explaining what happened, what it means, and what they should do next, could be useful, using the same multi-step flow as the onboarding dialogs we have for add link:
The overlay could have an option to never show again, and would be triggered any time a new revert notification is delivered to the user.